Correspondence with the local committee for promoting railway communication between Greenwich and Woolwich concerning the possible interference of trains with the instruments of the Royal Observatory, 1887-1888.

Correspondence concerning the proposed extension of the London Chatham and Dover Railway Co. Ltd, 1881-1888, including a printed copy of the Railway Extensions Act and notes by W. Ellis.

Correspondence concerning the Bexley Heath Railway extension, 1883-1888, including: 1. Bexley Heath Railway Act, 1883; 2. Bexley Heath Railway Act, 1886; 3. Bexley Heath Railway Act, 1887; 4. Clauses and acts of the Bexley Heath Railway; 5. Bexley Heath Railway Bill; and 6. Report of the Secretary of State for the Home Office on The Bexley Heath Railway Bill (1888).

Correspondence and other papers regarding experiments carried out at the Royal Observatory to establish the extent to which the trains passing close by were disturbing readings and instruments, 1888.

Correspondence with Mr Lockyer enquiring about the result of the above experiments, 1889.

Correspondence with the 'Daily Telegraph' concerning the effect of passing trains on Observatory instruments, 1890.